Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/26/2020   22:50:32   (   0.00,-137.23) (  -0.54,-139.68)  278.26                80
 11/27/2020   22:34:16   (  -0.00,-137.24) (   0.50,-135.10)  244.43                80
 11/29/2020   10:53:05   (   0.00,-137.24) (   0.66,-140.28)  346.21                80
 11/30/2020   10:36:47   (   0.01,-137.24) (  -0.32,-135.69)  175.90                80
 12/01/2020   22:55:45   (  -0.00,-137.22) (  -0.84,-140.91)  420.97                80
 12/02/2020   22:39:28   (  -0.01,-137.21) (   0.20,-136.33)  100.61                80
 12/04/2020   10:58:17   (   0.01,-137.20) (   0.97,-141.52)  491.59                80
 12/05/2020   10:42:01   (   0.01,-137.19) (  -0.07,-136.94)   29.58                80
 12/07/2020   22:42:01   (  -0.01,-137.14) (  -0.09,-137.57)   47.97                80
 12/08/2020   22:25:43   (  -0.01,-137.13) (   0.90,-132.97)  472.71                80